Hi
Trying to run cassandra 1.2.15 inside Centos 6.6 VMs on kernel 2.6.32-504.8.1.el6.x86_64, only to find that the java process(es) are burning a lot of cpu cycles especially on fast userland mutes (futex) that seems to timeout.
Tried with both Oracle JRE 1.7.76 and 1.8.0_05-b13 samme issue java procs burn allmost cpu cycles :/
Is this a Java+KVM/QEMU issue?
TIA
BTW PVE is reporting around 25-28% CPU usage out of the assigned 4 vCPUs when actually VM is burning almost all cycles approx 100%
Trying to run cassandra 1.2.15 inside Centos 6.6 VMs on kernel 2.6.32-504.8.1.el6.x86_64, only to find that the java process(es) are burning a lot of cpu cycles especially on fast userland mutes (futex) that seems to timeout.
Tried with both Oracle JRE 1.7.76 and 1.8.0_05-b13 samme issue java procs burn allmost cpu cycles :/
Is this a Java+KVM/QEMU issue?
TIA
BTW PVE is reporting around 25-28% CPU usage out of the assigned 4 vCPUs when actually VM is burning almost all cycles approx 100%
Code:
root@node5:~# dpkg -l | egrep pve\|qemu\|kvm
ii clvm 2.02.98-pve4 amd64 Cluster LVM Daemon for lvm2
ii corosync-pve 1.4.7-1 amd64 Standards-based cluster framework (daemon and modules)
ii dmsetup 2:1.02.77-pve4 amd64 Linux Kernel Device Mapper userspace library
ii fence-agents-pve 4.0.10-2 amd64 fence agents for redhat cluster suite
ii libcorosync4-pve 1.4.7-1 amd64 Standards-based cluster framework (libraries)
ii libdevmapper-event1.02.1:amd64 2:1.02.77-pve4 amd64 Linux Kernel Device Mapper event support library
ii libdevmapper1.02.1:amd64 2:1.02.77-pve4 amd64 Linux Kernel Device Mapper userspace library
ii liblvm2app2.2:amd64 2.02.98-pve4 amd64 LVM2 application library
ii libopenais3-pve 1.1.4-3 amd64 Standards-based cluster framework (libraries)
ii libpve-access-control 3.0-16 amd64 Proxmox VE access control library
ii libpve-common-perl 3.0-24 all Proxmox VE base library
ii libpve-storage-perl 3.0-31 all Proxmox VE storage management library
ii lvm2 2.02.98-pve4 amd64 Linux Logical Volume Manager
ii novnc-pve 0.4-7 amd64 HTML5 VNC client
ii openais-pve 1.1.4-3 amd64 Standards-based cluster framework (daemon and modules)
ii pve-cluster 3.0-16 amd64 Cluster Infrastructure for Proxmox Virtual Environment
ii pve-firewall 1.0-19 amd64 Proxmox VE Firewall
ii pve-firmware 1.1-3 all Binary firmware code for the pve-kernel
ii pve-kernel-2.6.32-37-pve 2.6.32-148 amd64 The Proxmox PVE Kernel Image
ii pve-libspice-server1 0.12.4-3 amd64 SPICE remote display system server library
ii pve-manager 3.4-1 amd64 The Proxmox Virtual Environment
ii pve-qemu-kvm 2.2-7 amd64 Full virtualization on x86 hardware
ii qemu-server 3.3-20 amd64 Qemu Server Tools
ii redhat-cluster-pve 3.2.0-2 amd64 Red Hat cluster suite
ii resource-agents-pve 3.9.2-4 amd64 resource agents for redhat cluster suite
ii tar 1.27.1+pve.1 amd64 GNU version of the tar archiving utility
ii vzctl 4.0-1pve6 amd64 OpenVZ - server virtualization solution - control tools